From ce7a3d02f1f99d26ad4dd2ed5798395daf458196 Mon Sep 17 00:00:00 2001
From: Dan Royer <dan@marginallyclever.com>
Date: Tue, 5 Dec 2023 09:50:57 -0800
Subject: [PATCH] Basic OpenGL panel test

---
 .../robotoverlord/renderpanel/OpenGLTest.java | 119 ++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 src/test/java/com/marginallyclever/robotoverlord/renderpanel/OpenGLTest.java

diff --git a/src/test/java/com/marginallyclever/robotoverlord/renderpanel/OpenGLTest.java b/src/test/java/com/marginallyclever/robotoverlord/renderpanel/OpenGLTest.java
new file mode 100644
index 000000000..c27a06cc4
--- /dev/null
+++ b/src/test/java/com/marginallyclever/robotoverlord/renderpanel/OpenGLTest.java
@@ -0,0 +1,119 @@
+package com.marginallyclever.robotoverlord.renderpanel;
+
+import com.jogamp.opengl.*;
+import com.jogamp.opengl.awt.GLJPanel;
+import com.jogamp.opengl.util.FPSAnimator;
+import com.marginallyclever.convenience.helpers.MatrixHelper;
+import com.marginallyclever.convenience.helpers.OpenGLHelper;
+import com.marginallyclever.robotoverlord.entity.Entity;
+import com.marginallyclever.robotoverlord.entity.EntityManager;
+import com.marginallyclever.robotoverlord.systems.render.ShaderProgram;
+import com.marginallyclever.robotoverlord.systems.render.Viewport;
+import com.marginallyclever.robotoverlord.systems.render.mesh.Mesh;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.swing.*;
+import javax.vecmath.Matrix4d;
+import javax.vecmath.Vector3d;
+import java.awt.*;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.nio.FloatBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+public class OpenGLTest implements RenderPanel {
+    private static final Logger logger = LoggerFactory.getLogger(OpenGLTest.class);
+    private final JPanel panel = new JPanel(new BorderLayout());
+    protected final GLJPanel glCanvas = createCanvas();
+    private final FPSAnimator animator = new FPSAnimator(30);
+
+    public OpenGLTest() {
+        super();
+        logger.info("creating {}",this.getClass().getName());
+        logger.info("\n"+JoglVersion.getInstance().toString());
+
+        panel.setMinimumSize(new Dimension(300, 300));
+        panel.add(glCanvas, BorderLayout.CENTER);
+
+        startAnimationSystem();
+    }
+
+    private GLCapabilities getCapabilities() {
+        GLProfile profile = GLProfile.getMaxProgrammable(true);
+        GLCapabilities capabilities = new GLCapabilities(profile);
+        capabilities.setHardwareAccelerated(true);
+        capabilities.setBackgroundOpaque(true);
+        capabilities.setDoubleBuffered(true);
+        capabilities.setStencilBits(8);
+        return capabilities;
+    }
+
+    private GLJPanel createCanvas() {
+        GLJPanel canvas = null;
+        try {
+            GLCapabilities capabilities = getCapabilities();
+            StringBuilder sb = new StringBuilder();
+            capabilities.toString(sb);
+            logger.info("capabilities="+sb);
+
+            canvas = new GLJPanel(capabilities);
+        } catch(GLException e) {
+            logger.error("Failed to get/set Capabilities.  Are your native drivers missing?");
+        }
+        return canvas;
+    }
+
+    private Mesh createTestTriangle() {
+        Mesh mesh = new Mesh();
+        mesh.addVertex(-10.0f, -10.0f, 0.0f);
+        mesh.addVertex(10.0f, -10.0f, 0.0f);
+        mesh.addVertex(0.0f,  10.0f, 0.0f);
+        mesh.addColor(1,0,0,1);
+        mesh.addColor(0,1,0,1);
+        mesh.addColor(0,0,1,1);
+        mesh.addNormal(0,0,1);
+        mesh.addNormal(0,0,1);
+        mesh.addNormal(0,0,1);
+        return mesh;
+    }
+
+    @Override
+    public JPanel getPanel() {
+        return panel;
+    }
+
+    @Override
+    public void startAnimationSystem() {
+        animator.add(glCanvas);
+        animator.start();
+    }
+
+    @Override
+    public void stopAnimationSystem() {
+        animator.stop();
+    }
+
+    @Override
+    public void updateSubjects(List<Entity> list) {}
+
+    @Override
+    public void setUpdateCallback(UpdateCallback updateCallback) {}
+
+    public static void main(String[] args) {
+        // make a frame
+        JFrame frame = new JFrame( OpenGLTest.class.getSimpleName());
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        OpenGLTest opengl = new OpenGLTest();
+        frame.setContentPane(opengl.getPanel());
+        frame.setPreferredSize(new Dimension(600,600));
+        frame.setSize(600,600);
+        frame.pack();
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
+    }
+}